/*
 * Copyright 2009 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package fr.onevu.gwt.uibinder.test.client;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.MouseOutEvent;
import com.google.gwt.event.dom.client.MouseOverEvent;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.OpenEvent;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.TreeItem;
import com.google.gwt.user.client.ui.Widget;

import fr.onevu.gwt.uibinder.client.UiField;
import fr.onevu.gwt.uibinder.client.UiHandler;
import fr.onevu.gwt.uibinder.client.UiTemplate;

/**
 * A simple demo showing how UiHandler works.
 */
public class HandlerDemo extends Composite {

	@UiTemplate("HandlerDemo.ui.xml")
	interface MyUiBinder extends UiBinder<Widget, HandlerDemo> {
	}

	private static final MyUiBinder binder = GWT.create(MyUiBinder.class);

	@UiField
	FormPanel panelForm;
	@UiField
	TextBox textBoxValueChange;
	@UiField(provided = true)
	final CustomEventWidget<String> customEventWidget;

	public HandlerDemo() {
		this.customEventWidget = new CustomEventWidget<String>("a simple test");
		initWidget(binder.createAndBindUi(this));
	}

	@UiHandler("panelForm")
	public void doSubmit(SubmitEvent event) {
		eventMessage(event);
		event.cancel();
	}

	@UiHandler("textBoxValueChange")
	protected void doChangeValue(ValueChangeEvent<String> event) {
		eventMessage(event);
	}

	@UiHandler({ "buttonClick", "labelClick" })
	void doClick(ClickEvent event) {
		eventMessage(event);
	}

	@UiHandler("buttonSubmit")
	void doClickSubmit(@SuppressWarnings("unused") ClickEvent ignored) {
		panelForm.submit();
	}

	@UiHandler("buttonMouseOut")
	void doMouseOut(MouseOutEvent event) {
		eventMessage(event);
	}

	@UiHandler("buttonMouseOver")
	void doMouseOver(MouseOverEvent event) {
		eventMessage(event);
	}

	@UiHandler("tree")
	void onTreeClose(CloseEvent<TreeItem> event) {
		eventMessage(event);
	}

	@UiHandler("tree")
	void onTreeOpen(OpenEvent<TreeItem> event) {
		eventMessage(event);
	}

	@UiHandler("customEventWidget")
	void onCustomEvent(CustomEvent<String> event) {
		eventMessage("CustomEventWidget clicked. Event throwing '" + event.getValue() + "'");
	}

	private void eventMessage(GwtEvent<?> event) {
		eventMessage(event.toDebugString());
	}

	private void eventMessage(String message) {
		Window.alert(message);
	}
}
